Yeast Population Lab Report During this experiment we were trying to determine how food availability affects CO2 production (related to population growth). We investigated how one factor influences the change in yeast population growth as measured by the amount of carbon dioxide produced. The yeast that you buy in the store contains living organisms–invisible small one celled‚ microorganisms. As long as they are kept dry‚ they are inactive. When they are given food‚ moisture and warmth‚ they
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Yeast Population Dynamics Lab How Environmental Factors Affect a Yeast Population’s Ability to Reproduce OBJECTIVE The objective of this experiment is to emphasize the influence that limiting factors have on a population. This lab tests yeast‚ a common component in baking‚ against two environmental factors (changes in temperature or concentration) to see what effect these have on the population dynamics of the yeast over a period of 72 hours. There are two sections of tests included in this
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Substrate concentration and yeast catalase Aim: To see how the substrate concentration in hydrogen peroxide affects the rate of an enzyme controlled reaction using yeast catalase. Introduction: An enzyme is a biological catalyst made of protein. Enzymes are protein molecules found in living organisms and in this case I will use a yeast catalase. Catalase is an enzyme that catalyzes the reduction of hydrogen peroxide. Hydrogen peroxide is a poisonous by-product of metabolism‚ so it is very
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Fish live in water and it is essential that they do as their gills only allow them to take in oxygen from the water. The percentage of oxygen is the water is significantly lower than the amount of oxygen in the air. Fish have adapted to be able to filter oxygen from the water despite its low percentage. Gas exchange in fish occurs in their gills which is supported by a bony arch. Fish take water in through their mouths. Water enters via a fish’s open mouth‚ its opercula close and stop water from leaving
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The methylene blue staining procedure is used to measure yeast viability based on the assumption that the methylene blue will enter the cells and be broken down by living yeast cells that produce the enzymes which breaks down methylene blue‚ leaving the cells colourless. The non- viable cells do not produce this enzyme (or enzymes) and as such the methylene blue that enters the cells are undegraded causing the cells to remain coloured (the oxidized form concentrates intracellularly). The coloured
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hypothesis made prior to the experiment was not correct - the distilled water did result in the most weight gain (g); however‚ the 5% salt concentration did not result in the least weight gain (g). Table 1 clearly highlights that the 3% salt concentration resulted in the least weight gain (g). The distilled water resulted in the most weight gain (g) because the solution is hypotonic – a hypotonic solution results in the water diffusing into the cell because the molecules of the substance are moving
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effect of temperature on the rate of fermentation in yeast by measuring the height of CO2 produced in a graduated cylinder at varying degrees Celsius. Yeast can perform cellular respiration and fermentation‚ the first needing oxygen (aerobic) and the second not (anaerobic). Cellular respiration is the normal way human bodies’ make energy‚ but when lacking oxygen‚ cells undergo fermentation‚ which creates less energy than respiration‚ CO2‚ and lactic acid (though in yeast‚ ethel alcohol is made instead
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produced in different temperature. If we have different temperature of yeast (0*‚ 22*‚37* and 100*). The yeast solution will have no activity or very little to measure at 0*. Temperature at 37* would show the most activation or CO2 production. The yeast solution at 100* will show no activity because that high of a temperature will cause denaturing to occur. Materials • Obtain Fermentation tube • Test tube • Ice • thermometer • Yeast/Sugar solution Methods Obtain 4 fermentation tubes and label each
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Soft Construction with Boiled Beans (Premontion of Civil War) was painted by Salvador Dali in 1936 in Spanish. The type of the painting is oil on canvas. The dimensions are 100cm x 99cm.The location of the painting is Philadelphia Musesum of Art‚ Philadelphia. The painting was a surrealist art work.This art work was one of the most radical of Salvador Dali art career.It showed the outbreak of the Spanish civil war was caused by fear.This painting was to predict the unrest erupted in Spain.It was
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In Hard-Boiled Wonderland and the End of the World‚ Murakami divides the protagonist into two characters‚ Boku and Watashi. In End of the World‚ Boku is assigned to the fantasy world of a walled town; here‚ at the end of the world‚ he serves as the reader of old dreams that are lodged within the skulls of unicorns. In Hard-Boiled Wonderland‚ the character Watashi is assigned to a futuristic Tokyo that is the scene of deadly conflicts between two competing information networks. Throughout the
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